/**
 * Created by hanbao0928 on 2018/11/1.
 */

public class DialogUtils extends ProgressDialog {
    public DialogUtils(Context context) {
        super(context);
    }

    public DialogUtils(Context context, int theme) {
        super(context, theme);
    }

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);

        init(getContext());
    }

    private void init(Context context) {
        setCancelable(true);
        setCanceledOnTouchOutside(false);

        setContentView(R.layout.loading);//loading的xml文件
        WindowManager.LayoutParams params = getWindow().getAttributes();
        params.width = WindowManager.LayoutParams.WRAP_CONTENT;
        params.height = WindowManager.LayoutParams.WRAP_CONTENT;
        getWindow().setAttributes(params);
    }

    @Override
    public void show() {//开启
        super.show();
    }

    @Override
    public void dismiss() {//关闭
        super.dismiss();
    }
}

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="100dp"
    android:layout_height="100dp"
    android:layout_gravity="center_horizontal"
    android:background="@drawable/shape_dialog_bg"//背景色
    android:layout_centerInParent="true"
    android:orientation="vertical">

    <RelativeLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_marginTop="10dp">

        <ProgressBar
            android:id="@+id/pb_load"
            android:layout_width="65dp"
            android:layout_height="65dp"
            android:indeterminateDrawable="@drawable/progressbar"//加载圈的样式
            android:layout_centerInParent="true"/>

    </RelativeLayout>

    <TextView
        android:id="@+id/tv_load_dialog"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_gravity="center_horizontal"
        android:text="加载中..."
        android:textColor="#9a9b98"
        android:textSize="12sp"/>

</LinearLayout>

<?xml version="1.0" encoding="utf-8"?>
<shape xmlns:android="http://schemas.android.com/apk/res/android" >

    <corners android:radius="8dp" />
    <solid android:color="#88000000" />
</shape>

<animated-rotate
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:pivotX="50%" android:pivotY="50%"
    android:fromDegrees="0"
    android:toDegrees="720">

    <shape
        android:shape="ring"
        android:innerRadiusRatio="3"
        android:thicknessRatio="15"
        android:useLevel="false">
        <gradient
            android:type="sweep"
            android:useLevel="false"
            android:startColor="#55c6c6c6"
            android:centerColor="#c6c6c6"
            android:centerY="0.50"
            android:endColor="#c6c6c6" />
    </shape>

</animated-rotate>

<style name="CustomDialog" parent="Theme.AppCompat.Dialog">
    <item name="android:backgroundDimEnabled">false</item>
    <item name="android:windowBackground">@android:color/transparent</item>
</style>

public class MainActivity extends AppCompatActivity {

    private DialogUtils loading;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

    }


   public void loding(View v){//点击加载并按钮模仿网络请求

       loading = new DialogUtils(this,R.style.CustomDialog);
       loading.show();
       new Handler().postDelayed(new Runnable() {//定义延时任务模仿网络请求
           @Override
           public void run() {
        loading.dismiss();//3秒后调用关闭加载的方法
           }
       }, 1000);
   }
}